linux-kernel - Re: [PATCH v6] fat: Batched discard support for fat

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Message-ID: <87d3la4ele.fsf@devron.myhome.or.jp>
Date:	Tue, 29 Mar 2011 15:37:17 +0900
From:	OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
To:	Kyungmin Park <kmpark@...radead.org>
Cc:	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	Lukas Czerner <lczerner@...hat.com>
Subject: Re: [PATCH v6] fat: Batched discard support for fat

Kyungmin Park <kmpark@...radead.org> writes:

>> Again, this ioctl's design is unclear, and seems to be strange. I
>> wouldn't want to add this before clearing it. Please explain what is
>> right behavior.
>
> Umm it's out of my scope. it's trim design.
> See also btrfs batched discard support. it's also no consideration as
> you mentioned.
>
> As I know, now xfs, ext4, and btrfs support this fstrim without these concern.
>
> http://thread.gmane.org/gmane.comp.file-systems.btrfs/9758

I looked at fstrim.c. It is lowlevel tools to just issue FITRIM - it
doesn't use the result at all.

Um. Honestly I'd like to see more or wait until real user for now,
instead of providing unclear design.

Thanks.
-- 
OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
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